Telescopic belt conveyor based on trailer and tractor thereof

Abstract

The invention provides a telescopic belt conveyor based on a trailer and a tractor thereof, and belongs to the field of concrete conveying. The belt conveyor comprises a rotary table and a material distribution arm frame, the material distribution arm frame is of a three-section telescopic nested arm frame structure and is divided into a base arm, a middle arm and a front arm which are each provided with a material distribution belt, and the head end and the tail end of each material distribution belt are wound around a redirection roller and a driving roller correspondingly to be tensioned and are independently controlled through the corresponding driving roller; a base of the driving roller is installed on the material distribution arm frame in a sliding mode, a hydraulic driving piece is installed on the side, not wound around the material distribution belt, of the driving roller, and when the material distribution belt is stretched, lengthened and slips, the hydraulic driving piece controls the driving roller to continue to move outwards along the tail end of each section of arm frame, and tensioning compensation is conducted on the material distribution belt. Through the modular structural design of the trailer, the telescopic belt conveyor is integrated on the semitrailer chassis meeting the road standard, and a plurality of sections of material distribution belts are additionally arranged to cooperatively control intelligent monitoring of belt slipping.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete transportation, in particular to a trailer-based telescopic belt conveyor and a tractor thereof. Background Art

[0002] In the construction of water conservancy and hydropower projects, pouring large volumes of concrete is a critical step, directly impacting the project's progress and quality. Currently, the primary concrete delivery equipment used in China includes concrete pump trucks and belt conveyors. While these devices meet construction needs to a certain extent, they still have some limitations. For example, concrete pump trucks have relatively low delivery efficiency and only transport small aggregates. Traditional belt conveyors, such as chassis belt conveyors, off-road chassis belt conveyors, and crawler-type tower conveyors, while capable of transporting large aggregates at high speeds, are relatively expensive to build and operate, and non-road equipment increases transportation and assembly costs.

[0003] With the increasing demand for national infrastructure, the demand for belt conveyors in mega-projects such as the Three Gorges Hydropower Station and the Baihetan Hydropower Station is becoming increasingly evident. These projects place higher demands on the performance of belt conveyors, including higher conveying efficiency, longer conveying distances, lower operating costs, and improved environmental adaptability. However, existing belt conveyor equipment has some design and functional deficiencies. For example, the spreading boom is mostly made of aluminum alloy, resulting in high vehicle manufacturing costs; the spreading distance is limited by the chassis, with a maximum spreading distance of only 38 meters; off-road chassis belt conveyors and crawler tower conveyors are non-road mobile machinery, suitable only for short-distance transfer operations and cannot be used for long-distance transportation. The whole machine is expensive and has poor stability. In addition, all belt conveyors on the market are engine-driven working devices, resulting in high emissions, severe environmental pollution, and high fuel costs.

[0004] Currently, telescopic belt conveyors are widely used in the field of concrete transportation. Their distribution booms adopt a multi-section structure to achieve the telescopic function, and each section is equipped with a distribution belt. To save head space, existing technologies generally adopt a tail drive method. This design will cause some problems. The load-bearing section is located above the belt, and the tail drive needs to continuously pull the entire unloaded belt, causing the belt to be in a strong tension state for a long time. The rubber material is prone to permanent deformation and slipping. Traditional monitoring methods rely on mechanical sensors, but splashes under concrete working conditions can easily damage the sensors, resulting in low reliability. In addition, existing technologies only focus on the slippage of a single belt section, but ignore the problem of coordinated imbalance between multiple belt sections. When a single belt section slips and causes a mismatch between the input speed and the output speed, such as the feed speed is greater than the discharge speed, concrete accumulates and splashes on the belt, causing material waste and pollution. Currently, there is no effective solution to simultaneously solve the problems of belt tension loss and coordinated control. Summary of the Invention

[0005] The purpose of the present invention is to provide a trailer-based telescopic belt conveyor and its tractor, which can intelligently control the slippage of the distribution belt of the multi-section distribution boom, and solve the problem of coordinated imbalance of the distribution belts corresponding to the multi-section distribution boom when the telescopic belt conveyor is conveying concrete.

[0006] To achieve the above object, the present invention provides the following technical solutions: On the one hand, the present invention discloses a trailer-based telescopic belt conveyor, comprising A turntable is provided on the trailer and is mounted on the rear end of the trailer frame via a slewing bearing; The cloth arm is a three-section arm structure that is telescopically nested with each other, and is divided into a basic arm, an intermediate arm and a forearm. One end of the basic arm is rotatably fixed to the top of the turntable by a pin, and a lifting cylinder is provided between the lower surface of the basic arm and the turntable. The lower surface of the other end of the basic arm is supported by a column fixed to the front end of the trailer frame. The intermediate arm is telescopically arranged in the basic arm, and the forearm is telescopically arranged in the intermediate arm. The upper inner part of the basic arm, the intermediate arm and the forearm are all equipped with a cloth belt. Each cloth belt The head and tail ends of the material belt are respectively wound around the redirecting roller and the driving roller for tensioning, and are independently controlled by the driving rollers arranged at their respective tail ends. In addition, each material belt is supported by a number of rollers in the length direction. The base of the driving roller is slidably mounted on the material arm, and a hydraulic drive component is installed on the side of the driving roller that is not wound around the material belt. When the material belt is stretched and becomes longer and slips, the hydraulic drive component controls the driving roller to continue to move outward along the tail ends of each section of the material arm to compensate for the tension of the material belt. The feeding system is located above the fabric arm, one end of which is connected to the turntable through a pin shaft, and the other end is equipped with a universal wheel; The trailer is also provided with a hydraulic system and an electric control system for driving the turntable to rotate, the loading system to feed, the fabric arm to pitch, and the fabric arm to extend and retract. The hydraulic system and the electric control system are both powered by a power battery assembly.

[0007] As a preferred technical solution of the present invention, the control of driving the extension and retraction of the fabric boom includes monitoring the slippage of the fabric belt, and the control process is as follows: Arrange monitoring equipment, install an optical distance sensor at the front end of each section of the fabric belt to monitor the linear speed of the fabric belt in real time, and set the number of sections of the fabric arm to n; the optical distance sensor and hydraulic drive unit are electrically connected to the electronic control system; Set the benchmark parameters and preset the linear speed design value of each section of the fabric belt And the allowable deviation threshold ΔV max ; Set the single compensation stroke S of the hydraulic drive 补 And the cumulative compensation amount S 累, the cumulative compensation amount S of the hydraulic drive parts 累 It is related to the actual elongation of the fabric belt ΔL. The elongation threshold of the fabric belt is set to ΔL. max ; Real-time monitoring to obtain the linear speed of each section of the fabric belt , calculated by the electronic control system, the single-section slip deviation , internode coordination deviation , i, j are any two sections of fabric belt, when or When , it is determined that the corresponding fabric belt is slipping; Dynamic graded supplementary control is provided based on the severity of the slip, with three levels of response: The first level response is slight slip, when ΔV n ≤0.5ΔV max And ΔV 协 ≤ΔV max When , only alarm is triggered without compensation; The secondary response is obvious slip, when 0.5ΔV max ≤ΔV n ≤ΔV max or 0.5ΔV max ≤ΔV 协 ≤ΔV max When the hydraulic drive of the corresponding section is started, a single compensation stroke S is executed. 补 , set the initial stroke of the hydraulic drive component of the corresponding section to S0, and update the cumulative compensation amount S 累 =S 补 +S0; The third level response is severe slip, when ΔV n >ΔV max or ΔV 协 >ΔV max When ΔL<ΔL max , start the hydraulic drive to continuously execute k single compensation strokes and k ≥ 2, and update the cumulative compensation amount S 累 =k•S 补 +S0; if ΔL≥ΔL max , triggering the shutdown alarm and marking the end of the life of the corresponding section of the fabric belt, prompting the replacement of the corresponding section of the fabric belt.

[0008] Further preferably, the control process of the fabric belt slippage monitoring further includes monitoring the cumulative compensation amount and life warning when the fabric belt is determined to be seriously slipping, setting the design length L of the fabric belt, the cumulative compensation amount S of the hydraulic drive part, and the life warning. 累 It is linearly related to the actual elongation of the fabric belt ΔL: S 累 = ;

[0009] Set the fabric belt extension threshold ΔL max =1%L, real-time monitoring of the cumulative compensation amount S of each fabric belt 累 At the same time, the actual elongation ΔL of the corresponding fabric belt is calculated. When ΔL≥0.7%L, an early warning is issued to indicate that the corresponding fabric belt is aging; when ΔL≥ΔL max When the machine is forced to stop and lock the hydraulic system, replace the fabric belt.

[0010] As an optimal technical solution of the present invention, the feeding system includes a feeding belt and a feeding arm. The feeding belt is supported by a number of rollers and is tensioned on the feeding arm through a tensioning device. One end of the feeding arm is connected to the top of the turntable through a pin shaft, and a lower hopper is provided below, facing the cloth belt near the tail end of the base arm.

[0011] As a preferred technical solution of the present invention, a hydraulic support leg is provided under the front end of the trailer frame, which is flush with the bottom of the axle at the rear end of the trailer; the trailer is also provided with side guard plates and rear guard plates, the rear guard plates are provided at the rear end of the frame, and the side guard plates are provided on both sides of the frame between the hydraulic support legs and the axle.

[0012] Another aspect of the present invention discloses a tractor, comprising a telescopic belt conveyor based on a trailer, and a traction seat. A traction docking port is provided at the bottom front end of the trailer frame, and the telescopic belt conveyor is fixed to the traction seat via a traction pin through the traction docking port provided on the trailer.

[0013] In summary, compared with the prior art, the present invention has the following beneficial effects: This invention utilizes a modular trailer structure to integrate a telescopic belt conveyor onto a semi-trailer chassis that meets road standards. This allows the conveyor to be driven directly onto the road under the traction of a tractor. This modular design completely addresses the industry pain point of off-road equipment, such as crawler-type tower conveyors, requiring disassembly and assembly for relocation, enabling rapid transfer between construction sites. Furthermore, the versatility of the tractor supports flexible "one vehicle, multiple trailers" scheduling, significantly reducing equipment idleness and overall operating costs. The core principle of this invention's structural design lies in the decoupling of the mechanical-traction system, enabling both independent and collaborative working of the working device and the transport carrier.

[0014] The telescopic belt conveyor of the present invention adopts a three-section telescopic arm, each section is equipped with a fabric belt and is individually controlled by a driving roller to form a three-section belt conveyor. Compared with the traditional telescopic belt conveyor, the number of rollers and redirecting rollers arranged in the present invention is significantly reduced, the belt conveyor layout route is simple, and the installation is convenient; at the same time, the overall layout of the belt conveyor is concentrated on the upper part of the arm, which occupies less space in the height direction, can reduce the size of the arm in the height direction, reduce the weight, and further reduce the cost of structural parts; each section of the belt conveyor is independent of each other, but runs simultaneously through program control, which ensures operability during operation. At the same time, a detection device is set. When a failure is detected in a certain section of the belt, the remaining sections of the belt stop working.

[0015] The present invention uses an optical distance measuring sensor to monitor the linear speed of the cloth belt in real time, and combines the two indicators of single-section deviation and inter-section coordinated deviation to determine slippage. This two-dimensional monitoring method can not only identify slippage caused by the elongation of the belt itself, but also prevent the imbalance of concrete flow caused by single-section slippage, and avoid waste caused by concrete accumulation and splashing. Dynamic graded supplementary control is implemented according to the severity of the slippage, and is divided into three levels of response: slight slippage, obvious slippage, and severe slippage. The belt is tensioned and compensated by a hydraulic drive component, which can effectively solve the problem of belt slippage caused by long-term stretching, extend the service life of the belt, and quantitatively evaluate the degree of belt aging through the cumulative compensation amount, and set a safety protection mechanism. By setting the cumulative compensation stroke threshold, the degree of belt aging can be monitored in real time. When the cumulative compensation amount reaches a certain proportion, an early warning prompts the aging of the belt; when the threshold is reached, the machine is forced to stop and the hydraulic system is locked, prompting the replacement of the belt, effectively avoiding safety hazards caused by excessive aging of the belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a trailer-based telescopic belt conveyor of the present invention; Figure 2 It is a structural schematic diagram of the telescopic belt conveyor of the present invention; Figure 3 This is a schematic diagram of the basic arm structure of the telescopic belt conveyor of the present invention; Figure 4 It is a schematic structural diagram of the intermediate arm of the telescopic belt conveyor of the present invention; Figure 5 It is a schematic diagram of the forearm structure of the telescopic belt conveyor of the present invention; Figure 6 It is a structural schematic diagram of a trailer-based telescopic belt conveyor and its tractor according to the present invention; The reference numerals in the figure are: 1-tractor, 10-traction seat, 2-trailer, 21-frame, 22-hydraulic support leg, 23-axle, 24-side guard plate, 25-rear guard plate, 26-column, 3-telescopic belt conveyor, 30-clothing belt, 31-clothing arm, 311-base arm, 312-intermediate arm, 313-forearm, 32-roller, 33-drive roller, 34-redirecting roller, 4-feeding system, 41-feeding arm, 42-feeding belt, 43-universal wheel, 5-turntable, 50-slewing bearing, 51-lifting cylinder, 6-power battery assembly, 7-electronic control system, 8-hydraulic system. DETAILED DESCRIPTION

[0017] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments given here are only used to illustrate and explain the present invention and cannot be used to limit the present invention.

[0018] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also have other implementations and variations thereof. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0019] Reference Figure 1 and Figure 6 On the one hand, this embodiment discloses a trailer-based telescopic belt conveyor 3, including The turntable 5 is provided on the trailer 2 and is mounted on the rear end of the frame 21 of the trailer 2 via a slewing bearing 50; The fabric arm 31 is a three-section telescopic nested arm structure, which is divided into a base arm 311, an intermediate arm 312 and a forearm 313. One end of the base arm 311 is rotatably fixed to the top of the turntable 5 by a pin, and a lifting cylinder 51 is provided between the lower surface of the base arm 311 and the turntable 5. The lower surface of the other end of the base arm 311 is supported by a column 26 fixed to the front end of the frame 21 of the trailer 2. The intermediate arm 312 is telescopically arranged in the base arm 311, and the forearm is telescopically arranged in the intermediate arm 312. The upper inner parts of the base arm 311, the intermediate arm 312 and the forearm 313 are all equipped with There is a fabric belt 30, each of which is tensioned by winding around a redirecting roller 34 and a driving roller 33 at its head and tail ends. Both ends are independently controlled by the driving roller 33 provided at their tail ends. Each fabric belt 30 is supported in its length direction by a plurality of rollers 32. The base of the driving roller is slidably mounted on the fabric arm 31, and a hydraulic drive element (not shown) is installed on the side of the driving roller not wound around the fabric belt. When the fabric belt 30 is stretched and slips, the hydraulic drive element controls the driving roller 33 to continue to move outward along the tail ends of each section of the fabric arm to compensate for the tension of the fabric belt 30. The feeding system 4 is located above the feeding arm 31, one end of which is connected to the turntable 5 through a pin, and the other end is provided with a universal wheel 43; The trailer 2 is also provided with a hydraulic system 8 and an electric control system 7 for driving the turntable 5 to rotate, the loading system 4 to feed, the fabric arm 31 to pitch, and the fabric arm 31 to extend and retract. The hydraulic system 8 and the electric control system 7 are both powered by a power battery assembly 6.

[0020] In this embodiment, the turntable 5 is a key structural component for mounting the distribution boom 31, which can rotate on the trailer 2. The distribution boom 31 is hinged to the top of the turntable 5, and two lifting cylinders 51 are installed between the distribution boom 31 and the turntable 5. Under the action of the lifting cylinders 51, the distribution boom 31 can be pitched.

[0021] The telescopic belt conveyor is set as a three-section belt, which is telescopically extended by the corresponding arms. A driving roller is set at the tail end. The tail drive method is adopted to adapt to the belt conveyor structure, which can save head space and is better suitable for the working conditions of transporting materials downward. It is also convenient to inspect the fabric belt of each arm.

[0022] In specific implementation, the control of driving the extension and retraction of the fabric arm 31 includes the slippage monitoring of the fabric belt 30, and the control process is as follows: The monitoring equipment is arranged such that an optical distance measuring sensor (not shown) is installed at the front end of each section of the fabric belt 30, with the extension direction of the fabric boom 31 as the front end. The optical distance measuring sensor and the hydraulic drive element (not shown) are both electrically connected to the electronic control system. Set the reference parameters and preset the design value of the linear speed of each section of the fabric belt 30 And the allowable deviation threshold ΔV max ; Set the single compensation stroke S of the hydraulic drive 补 And the cumulative compensation amount S 累 , the cumulative compensation amount S of the hydraulic drive parts 累 It is related to the actual elongation of the fabric belt ΔL. The elongation threshold of the fabric belt is set to ΔL. max ; Real-time monitoring to obtain the linear speed of each section of the fabric belt 30 , calculated by the electronic control system 7, the single-section slip deviation , internode coordination deviation , where i, j are any two sections of fabric belt 30, when or When , it is determined that the corresponding fabric belt 30 is slipping; Aiming at the problem of belt elongation and slippage caused by tail drive of belt conveyor and concrete waste caused by unbalanced coordination of multiple sections, two indicators are introduced to judge slippage. The first indicator is single section deviation. The optical distance sensor compares the measured speed with the design value in real time to identify the elongation of the belt itself. When ΔV n When abnormal, it indicates that the belt of the corresponding section is aging and needs to be compensated or replaced; the second indicator is the inter-section coordination deviation, which dynamically monitors the linear speed difference of the three sections of the cloth belt 30 corresponding to the base arm 311, the middle arm 312 and the forearm 313 in this embodiment to prevent the concrete flow imbalance caused by the slip of a single section. When ΔV 协 Even if the critical slip threshold is not reached during an abnormality, concrete accumulation and splashing can still be prevented, improving construction efficiency. This not only avoids the risk of missed detection in traditional single-dimension detection, but also accurately distinguishes the type of slip.

[0023] Dynamic graded supplementary control is provided based on the severity of the slip, with three levels of response: The first level response is slight slip, when ΔV n ≤0.5ΔV max And ΔV 协 ≤ΔV max When , only alarm is triggered without compensation; The secondary response is obvious slip, when 0.5ΔV max ≤ΔV n ≤ΔV max or 0.5ΔV max ≤ΔV 协 ≤ ΔV max When the hydraulic drive of the corresponding section is started, a single compensation stroke S is executed. 补 , set the initial stroke of the hydraulic drive component of the corresponding section to S0, and update the cumulative compensation amount S 累 =S 补 +S0; The third level response is severe slip, when ΔV n >ΔV max or ΔV 协 >ΔV max When ΔL<ΔL max , start the hydraulic drive to continuously execute k single compensation strokes and k ≥ 2, and update the cumulative compensation amount S 累 =k•S 补 +S0; if ΔL≥ΔL max , triggering the shutdown alarm and marking the end of the life of the corresponding section of the fabric belt, prompting the replacement of the corresponding section of the fabric belt.

[0024] Further preferably, the control process of the fabric belt slippage monitoring further includes monitoring the cumulative compensation amount and life warning when the fabric belt is determined to be seriously slipping, setting the design length L of the fabric belt, the cumulative compensation amount S of the hydraulic drive part, and the life warning. 累 It is linearly related to the actual elongation of the fabric belt ΔL: S 累 = ;

[0025] Set the fabric belt extension threshold ΔL max =1%L, real-time monitoring of the cumulative compensation amount S of each fabric belt 累 At the same time, the actual elongation ΔL of the corresponding fabric belt is calculated. When ΔL≥0.7%L, an early warning is issued to indicate that the corresponding fabric belt is aging; when ΔL≥ΔL max When the machine is forced to stop and lock the hydraulic system 8, replace the fabric belt 30.

[0026] This embodiment monitors and controls the slippage of the three distribution belts 30 corresponding to the three-section telescopic boom, namely the base arm 311, the middle arm 312 and the forearm 313. On the basis of the structure, intelligent instruments are installed on the telescopic belt conveyor, and optical ranging sensors are used to avoid concrete splash damage, adapt to harsh working conditions, and collect reliable data. At the same time, in order to solve the problem of concrete waste caused by the elongation and slippage of the distribution belt 30 itself and the mismatch between the inter-section speed, a two-dimensional slip judgment is set. The single-section deviation monitors the slippage caused by the elongation of the belt itself, and the inter-section coordinated deviation prevents the imbalance of the concrete conveying flow, such as the splashing and waste caused by the feed speed being greater than the discharge speed. Combined with the slip severity classification, the compensation strength is dynamically matched, and the degree of belt aging is quantitatively evaluated by the accumulated compensation amount. At the same time, a safety protection mechanism with a stroke accumulation threshold is set.

[0027] During specific implementation, the feeding system 4 includes a feeding belt 42 and a feeding arm 41. The feeding belt 42 is supported by a number of rollers 32 and is tensioned on the feeding arm 41 through a tensioning device. One end of the feeding arm 41 is connected to the top of the turntable 5 through a pin shaft, and a lower hopper is provided below, facing the cloth belt 30 near the tail end of the base arm 311.

[0028] When the telescopic belt conveyor is in operation, the loading belt 42 transfers concrete and other fillers delivered from outside to the distribution belt 30. The distribution belt 30 is adjusted in inclination and rotated 360 degrees horizontally to unload and fill the selected working point. This system has the advantages of large transport capacity, high efficiency, and a wide working space.

[0029] During specific implementation, a hydraulic support leg 22 is provided under the front end of the frame 21 of the trailer 2, which is flush with the bottom of the axle 23 at the rear end of the trailer 2; the trailer 2 is also provided with side guard plates 24 and rear guard plates 25, the rear guard plates 25 are provided at the rear end of the frame 21, and the side guard plates 24 are provided on both sides of the frame 21 between the hydraulic support legs 22 and the axle 23.

[0030] like Figure 6 As shown, another aspect of this embodiment discloses a tractor 1, including a telescopic belt conveyor based on a trailer, and also including a traction seat 10. A traction docking port is provided at the bottom front end of the frame 21 of the trailer 2, and the telescopic belt conveyor is fixed to the traction seat 10 by a traction pin via the traction docking port provided on the trailer 2.

[0031] The present invention relates to a trailer-based telescopic belt conveyor and its tractor, comprising a tractor 1, an integrated charging and replacement power battery assembly 6, an electronic control system 7, a hydraulic system 8, a trailer 2, a turntable 5, a material distribution arm 31, a loading arm 41, a material distribution belt 30, and a loading belt 42. The tractor 1 is manufactured by a professional automobile manufacturer and complies with road driving and transportation regulations. It can be used on the road normally after obtaining the corresponding certificate of conformity. It is used solely for towing the trailer 2 and transporting it to other locations, and does not provide power for the working device on the trailer 2. The trailer 2 serves as the base supporting the entire working device. The design and manufacture of the trailer 2 fully comply with national semi-trailer standards. When the working device is not in operation, the trailer 2 meets road driving and transportation requirements. After obtaining the corresponding certificate of conformity, the trailer 2 can be towed by the tractor 1 for normal road transportation. When the working device is in operation, the tractor 1 can be disconnected from the trailer 2 and used for other operations, while the working device on the trailer 2 can operate using an external power source and the discharge of the power battery. The tractor 1 is a very versatile product. There are a large number of tractors on the market that can be matched with the patented trailer 2. In addition to being convenient for design selection and calculation, the trailer 2 can also be flexibly selected during on-site construction, and is extremely maneuverable.

[0032] The power battery assembly 6 is composed of a battery pack, a battery mounting frame, a radiator, and other components. The power output of the power battery is processed by the electronic control system 7 and can be used to drive the power system of the working device. The power battery assembly 6 uses a mature lithium iron phosphate battery cell as its power source. It is installed on the trailer 2 and is rechargeable and interchangeable. It is typically used as a backup power source. It can be used temporarily to continue driving the working device after a sudden power outage on site. This prevents concrete from sticking to the belt after prolonged adhesion and other impacts caused by emergency shutdown of the equipment. The power battery assembly 6 can also serve as the primary power source, allowing the equipment to continue to be used at construction sites where external power is unavailable. The interchangeable power supply of the power battery assembly 6 saves charging time and improves construction efficiency.

[0033] The electronic control system 7 controls the movement of the working device on the trailer 2, converts external power into power that can be directly used by the working device, and converts power from the power battery into power that can be directly used by the working device.

[0034] The hydraulic system 8 consists of a drive motor, hydraulic oil tank, hydraulic pump, valve block, hydraulic actuators, and hydraulic lines. These components are integrated into a hydraulic pump station, resulting in a compact structure and easy maintenance. The hydraulic oil circuits for the working devices on the trailer 2 in this application are as follows: the oil circuit for the trailer 2 outrigger cylinders, the oil circuit for the lifting cylinder 51 of the fabric boom 31, the oil circuit for the rotary motion of the fabric boom 31, the oil circuit for the motor of the fabric belt 30, and the oil circuit for the motor of the loading belt 42.

[0035] Furthermore, traditional telescopic belt conveyors use multi-section booms to drag a single belt. As we all know, the longer the belt, the greater the required tension and the greater the tension it experiences due to its own weight, accumulated friction, and resistance to redirection. The greater the tension on the belt, the more wear it experiences, and the faster the high tension causes fatigue, ultimately reducing its lifespan. Furthermore, the longer the belt, the more demanding its overall installation requirements are, increasing the risk of the belt running off course. Compared to traditional telescopic belt conveyors, the shorter belt of the present invention not only reduces installation requirements but also improves the stress conditions on the belt and structural components such as rollers, significantly extending its service life.

[0036] The present invention has a new structure in which the telescopic belt conveyor and the arm are installed on the trailer 2. The overall structure is compact and the layout is reasonable, so that the long-distance transportation of the telescopic belt conveyor with an ultra-long spreading distance can be easily solved, which greatly saves the transportation cost and the installation and disassembly cost. In addition, the manufacturing difficulty and manufacturing cost of the trailer 2 are lower than those of other traditional types of telescopic belt conveyors; the trailer 2 is towed by the tractor 1, and the overall combination is flexible. It is extremely simple and convenient to design and select and replace the tractor 1 on site. In the operating mode, multiple trailers 2 can be matched with one tractor 1, and even the tractor 1 can be rented; such a flexible combination method has more advantages than other traditional types of telescopic belt conveyors in terms of equipment cost control.

[0037] It should be understood that the above embodiments are one or more embodiments of the present invention, and there are many other embodiments and variations thereof based on the present invention; the variations and modifications made by ordinary technicians in this industry through the present invention without making groundbreaking innovations all fall within the scope of protection of the present invention.

Claims

1. A trailer-based telescopic belt conveyor, characterized in that: include A turntable is provided on the trailer and is mounted on the rear end of the trailer frame via a slewing bearing; The lifting mechanism is a bottom jack that is fixed on the lifting platform of the lifting platform, and the lifting mechanism is connected with the lifting mechanism of the lifting platform to the lifting platform, and the lifting mechanism is connected with the lifting mechanism of the lifting platform to the lifting platform. The feeding system is located above the fabric arm, one end of which is connected to the turntable through a pin shaft, and the other end is equipped with a universal wheel; The trailer is also provided with a hydraulic system and an electric control system for driving the turntable to rotate, the loading system to feed, the fabric arm to pitch, and the fabric arm to extend and retract. The hydraulic system and the electric control system are both powered by a power battery assembly.

2. The trailer-based telescopic belt conveyor according to claim 1, characterized in that: The control of driving the extension and retraction of the fabric boom includes monitoring and compensation of fabric belt slippage. The control process is as follows: Arrange monitoring equipment, install an optical distance sensor at the front end of each section of the fabric belt to monitor the linear speed of the fabric belt in real time, and set the number of sections of the fabric arm to n; the optical distance sensor and hydraulic drive unit are electrically connected to the electronic control system; Set the benchmark parameters and preset the linear speed design value of each section of the fabric belt And the allowable deviation threshold ΔV max ; Set the single compensation stroke S of the hydraulic drive for the stretched fabric belt 补 And the cumulative compensation amount S 累 , the cumulative compensation amount S of the hydraulic drive parts 累 It is related to the actual elongation of the fabric belt ΔL. The elongation threshold of the fabric belt is set to ΔL. max ; Real-time monitoring to obtain the linear speed of each section of the fabric belt , calculated by the electronic control system, the single-section slip deviation , internode coordination deviation , i, j are any two sections of fabric belt, when or When , it is determined that the corresponding fabric belt is slipping; Dynamic graded supplementary control is provided based on the severity of the slip, with three levels of response: The first level response is slight slip, when ΔV n ≤0.5ΔV max And ΔV 协 ≤ΔV max When , only alarm is triggered without compensation; The secondary response is obvious slip, when 0.5ΔV max ≤ΔV n ≤ ΔV max or 0.5ΔV max ≤ΔV 协 ≤ΔV max When the hydraulic drive of the corresponding section is started, a single compensation stroke S is executed. 补 , set the initial stroke of the hydraulic drive component of the corresponding section to S0, and update the cumulative compensation amount S 累 =S 补 +S0; The third level response is severe slip, when ΔV n >ΔV max or ΔV 协 >ΔV max When ΔL<ΔL max , start the hydraulic drive to continuously execute k single compensation strokes and k ≥ 2, and update the cumulative compensation amount S 累 =k•S 补 +S0; if ΔL≥ΔL max , triggering the shutdown alarm and marking the end of the life of the corresponding section of the fabric belt, prompting the replacement of the corresponding section of the fabric belt.

3. The trailer-based telescopic belt conveyor according to claim 2, characterized in that: The control process of the fabric belt slippage monitoring also includes monitoring the cumulative compensation amount and life warning when the fabric belt is judged to be seriously slipping, setting the design length L of the fabric belt, the cumulative compensation amount S of the hydraulic drive part, and the life warning. 累 It is linearly related to the actual elongation of the fabric belt ΔL: S 累 = ; Set the fabric belt extension threshold ΔL max =1%L, real-time monitoring of the cumulative compensation amount S of each fabric belt 累 At the same time, the actual elongation ΔL of the corresponding cloth belt is calculated. When ΔL ≥ 0.7% L, an early warning is issued to indicate that the corresponding cloth belt is aging. When ΔL ≥ ΔL max When the machine is forced to stop and lock the hydraulic system, replace the fabric belt.

4. The trailer-based telescopic belt conveyor according to claim 1, characterized in that: The feeding system includes a feeding belt and a feeding arm. The feeding belt is supported by a number of rollers and is tensioned on the feeding arm through a tensioning device. One end of the feeding arm is connected to the top of the turntable through a pin shaft, and a lower hopper is provided below, facing the cloth belt near the tail end of the base arm.

5. The trailer-based telescopic belt conveyor according to claim 1, characterized in that: A hydraulic support leg is provided below the front end of the trailer frame, flush with the bottom of the axle at the rear end of the trailer; the trailer is also provided with side guard plates and rear guard plates, the rear guard plates are provided at the rear end of the frame, and the side guard plates are provided on both sides of the frame between the hydraulic support leg and the axle.

6. A tractor, characterized in that: The telescopic belt conveyor based on the trailer comprises any one of claims 1 to 5, and further comprises a traction seat, wherein a traction docking port is provided at the bottom of the front end of the trailer frame, and the telescopic belt conveyor is fixed to the traction seat by a traction pin via the traction docking port provided on the trailer.

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